CN214888691U

CN214888691U - Differential locking device for agricultural motor vehicle

Info

Publication number: CN214888691U
Application number: CN202120330715.9U
Authority: CN
Inventors: 张凤林
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-26
Anticipated expiration: 2031-02-05

Abstract

The utility model provides an agricultural motor vehicle differential locking device, including the gear box, differential mechanism, the semi-axis assembly seat, the semi-axis, semi-axis drive gear, the gear is situated between in the transmission between differential mechanism and the semi-axis drive gear, semi-axis drive gear concentric location minor axis about the looks remote site of semi-axis has one, assemble two concentric location bearings on the minor axis, there is the axial bulge around semi-axis drive gear one side shaft hole, protruding tip shaft hole expands into concentric location bearing chamber, bellied outer circumference forms gear or spline, semi-axis drive gear respectively contains a concentric location bearing, slide in a semi-axis drive gear's the arch and be equipped with the differential lock cover of internal tooth or spline groove, insert the shift fork in the differential lock cover shifting fork groove, the utility model discloses an active effect is: the left half shaft driving gear and the right half shaft driving gear are ensured to be on the same axis, the differential lock sleeve slides smoothly between the two half shaft gears, the differential lock sleeve is in surface contact with the half shaft gears, the pressure is small, the stress is uniform, the transmission is stable, no blocking exists during the locking operation, and the service life of the assembly is long.

Description

Differential locking device for agricultural motor vehicle

Technical Field

The utility model belongs to the vehicle, the interim locking mechanical system of the differential function of concretely relates to agricultural motor vehicle.

Background

In order to stabilize the driving and reduce the power consumption, the motor vehicles driven coaxially and bilaterally are provided with differential devices. For road transport vehicles, the differential locking problem does not have to be considered. However, agricultural vehicles, which are mainly used for agricultural production, are often used alternately on roads and in farmlands. The advantages of the differential function are well known in road driving. Problems encountered in the field, the head, and the dirt roads are also conceivable. That is, when one wheel slips and flies due to potholes, mud, ice and snow on the ground, the other wheel capable of forming a frictional driving force does not obtain a rotational moment and is not threaded, and differential driving at this time has disadvantages and disadvantages. According to the use characteristics of agricultural motor vehicles, the technical scheme of the differential temporary locking device of the agricultural motor vehicle is provided. Such as chinese patent CN204512355U (a differential lock for agricultural steering wheel transport vehicle) which has been put into use. According to the differential lock, the differential lock gear which is always in sliding fit with the spline of the half shaft on one side is temporarily meshed with the inner gear ring of the driving gear on the half shaft on the other side under the pushing of the shifting fork, so that the left and right half shaft driving gears are forced to synchronously rotate, namely the left and right half shafts are forced to synchronously rotate, the differential function is locked, the wheels on two sides synchronously rotate at equal moment, and the wheels on one side which can form larger friction force with the ground obtain friction thrust to move a vehicle.

Although the differential locking device can lock the differential as required, the left half shaft and the right half shaft are axially and relatively positioned on the half shaft seats respectively assembled on the two sides of the gear box, and the axes of the two half shafts are difficult to coincide due to component machining errors and assembly errors. The differential lock gear assembled on the half shaft on one side and concentric with the half shaft is difficult to be coaxial with the half shaft driving gear on the other side, and the differential lock gear is not smooth in carrying, blocked, poor in locking meshing state and accelerated in abrasion of a locking mechanism.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an agricultural motor vehicle differential locking means for interim locking differential function of agricultural motor vehicle when unilateral wheel skids. Overcoming the aforementioned deficiencies of the prior art.

The utility model discloses a differential locking device includes the gear box, assembles the differential mechanism in the gear box, fixes half axle assembly seat about on the gear box, through the bearing install half axle about on half axle assembly seat, half axle drive gear, differential mechanism both sides differential output gear and control the transmission gear between the half axle drive gear about on the half axle, the improvement of doing is: the opposite ends of the left half shaft and the right half shaft are provided with a left half shaft driving gear and a right half shaft driving gear which are concentric to each other, two concentric positioning bearings are assembled on the concentric positioning short shafts, axial protrusions are arranged around the shaft holes on one sides of the left half shaft driving gear and the right half shaft driving gear, the shaft holes at the axial protrusion end parts of the half shaft driving gears are expanded into bearing cavities matched with the peripheries of the concentric positioning bearings, gear or spline circumferential surfaces are formed on the outer circumferences of the axial protrusions of the half shaft driving gears, the axial protrusion parts of the left half shaft driving gear and the right half shaft driving gear are oppositely arranged on the respective half shaft, the left half shaft driving gear and the right half shaft driving gear respectively comprise one concentric positioning bearing, differential lock sleeves with inner teeth or spline grooves are assembled on the protrusions of the half shaft driving gears in a sliding mode, shifting forks are inserted into shifting fork assembly grooves on the outer circumferential surfaces of the differential lock sleeves, the shifting forks are arranged on shifting fork shafts in the gear boxes, and the shifting forks are connected with control rods extending out of the gear boxes.

The utility model discloses a user state is: when the differential lock is not locked, the differential lock sleeve is completely positioned on the axial bulge of the half axle drive gear on one side (assembly side), and when the differential lock is required to be locked, the shifting fork drives the differential lock sleeve to cut into the gear or spline circumferential surface of the bulge part of the half axle gear on the opposite side, so that the differential lock sleeve is meshed with the axial bulge parts of the left half axle gear and the right half axle gear simultaneously, and the differential drive is locked. When the locking is released, the shifting fork drives the differential lock sleeve to return to the axial bulge of the half axle driving gear on one side.

The utility model has the advantages that: the concentric positioning short shaft, the concentric positioning short shaft and the concentric positioning bearing between the left half shaft driving gear and the right half shaft driving gear are inserted between the left half shaft and the right half shaft, so that the axes of the left half shaft driving gear and the right half shaft driving gear are ensured to be on the same axis, the differential lock sleeve can smoothly slide between the two half shaft gears and is in surface contact with the half shaft gears, the pressure is small, the stress is uniform, the transmission is stable, the clamping and blocking phenomena occasionally occurring during the locking operation are eliminated, and the service life of the assembly is long.

Drawings

Fig. 1 is the overall structure diagram of the differential locking device of the present invention.

Fig. 2 is a short axis view of the concentric positioning in the differential locking device of the present invention.

Fig. 3 is a diagram of the left and right half-axle driving gears in the differential locking device of the present invention.

Fig. 4 is a front view of the differential lock sleeve in the differential locking device of the present invention.

Fig. 5 is a side sectional view of the differential lock sleeve in the differential locking device of the present invention.

Detailed Description

Referring to fig. 1, the utility model discloses a differential locking device includes gear box 1, the differential mechanism 2 of assembly in the gear box, fix left semi-axis assembly seat 9 on the gear box, right semi-axis assembly seat 6, install left 8 semi-axes, right semi-axis 5 on semi-axis assembly seat through the bearing, in the gear box fixed assembly on the 8 journals of left semi-axis drive gear 10, fixed assembly on the 5 journals of right semi-axis drive gear 7, differential mechanism 2 both sides differential output gear and control the transmission gear between the

semi-axis drive gear

2 and 4. The opposite ends of the left half shaft and the right half shaft are provided with a left half shaft driving gear and a right half shaft driving gear concentric positioning short shaft 11, the axial middle part of the concentric positioning short shaft 11 is provided with an isolation convex edge 11-1, the concentric positioning short shaft is provided with two cylindrical rolling

concentric positioning bearings

12 and 13,

referring to fig. 1 and 3, taking a half-shaft driving gear 10 as an example, an axial protrusion 10-1 is arranged around a shaft hole at one side of the half-shaft driving gear, the shaft hole at the end part of the axial protrusion of the half-shaft driving gear is expanded into a bearing cavity 10-2 matched with the periphery of a concentric positioning bearing, the outer circumference of the axial protrusion 10-1 of the half-shaft driving gear forms a gear circumferential surface 10-2, and the axial protrusions of the left and right half-

shaft driving gears

7 and 10 are oppositely arranged on the respective half shafts. The two half-shaft drive gears each contain a concentric locating bearing.

Referring to fig. 1, 4 and 5, a differential lock sleeve 14 with internal teeth 14-2 is slidably assembled on a projection of a right (or left) half-axle driving gear, a shift fork (not shown) is inserted into a shift fork assembly groove 14-1 on the outer peripheral surface of the differential lock sleeve 14, the shift fork is mounted on a shift fork shaft (not shown) in the gear box, and the shift fork is engaged with an operating lever (not shown) extending out of the gear box.

Claims

1. The utility model provides an agricultural motor vehicle differential locking means, includes the gear box, assembles the differential mechanism in the gear box, fixes half axle assembly seat about on the gear box, installs the half axle about on half axle assembly seat through the bearing, in the gear box fixed assembly half axle drive gear about on the axle journal, differential mechanism both sides differential output gear and about the transmission gear between the half axle drive gear, characterized by: the opposite ends of the left half shaft and the right half shaft are provided with a left half shaft driving gear and a right half shaft driving gear which are concentric to each other, two concentric positioning bearings are assembled on the concentric positioning short shafts, axial protrusions are arranged around the shaft holes on one sides of the left half shaft driving gear and the right half shaft driving gear, the shaft holes at the axial protrusion end parts of the half shaft driving gears are expanded into bearing cavities matched with the peripheries of the concentric positioning bearings, gear or spline circumferential surfaces are formed on the outer circumferences of the axial protrusions of the half shaft driving gears, the axial protrusion parts of the left half shaft driving gear and the right half shaft driving gear are oppositely arranged on the respective half shaft, the left half shaft driving gear and the right half shaft driving gear respectively comprise one concentric positioning bearing, differential lock sleeves with inner teeth or spline grooves are assembled on the protrusions of the half shaft driving gears in a sliding mode, shifting forks are inserted into shifting fork assembly grooves on the outer circumferential surfaces of the differential lock sleeves, the shifting forks are arranged on shifting fork shafts in the gear boxes, and the shifting forks are connected with control rods extending out of the gear boxes.